Outboard motor locking device



R. w. PASANEN 2,693,691

OUTBOARD MOTOR LOCKING DEVICE Nov. 9, 1954 Filed Sept. 2l, 1953 IN VENTOR. Roy ZdzZZz'am Pasann #Hav-nay.

United States Patent() OUTBOARD MOTOR LOCKING DEVICE Roy WilliamPasanen, Sudbury, Ontario, Canada Application September 21, 1953, SerialNo. 381,410

4 Claims. (Cl. 70-58) This invention relates to devices for locking inplace outboard motors on transoms of boats.

A very important problem incident to the use of outboard motors residesin the lack of effective clamping means for mounting the motor on a boattransom. The weight and operating vibration of the motor is such that itis extremely diiiicult to provide a simple clamping means which will notloosen in use. Loosening of the motor mounting on the boat not onlyresults in possible damage or loss of the motor but constitutes a hazardto occupants of the boat.

It is an object of this invention to provide an outboard motor lockingdevice which will effectively and rigidly lock the motor to a boattransom with substantial elimination of the possibility of the motorloosening from the boat transom during operation of the motor, and whichis subject to convenient and inexpensive manufacture, while beingapplicable to motors of a Wide range of sizes.

Another object is to provide a locking device of the type referred towhich may be employed to avoid theft of the motor while attached to theboat with such device.

The invention will be described with reference to the accompanyingdrawing in which,

Figure l is a plan view of the device in accordance with the inventionas applied to a boat transom,

Figure 2 is a side elevation of the device,

Figure 3 is a detail plan view of a portion of the device, and

Figure 4 is an end elevation of a slightly modified form of the device.

In the drawing, 1 is a boat transom on which the device 2 in accordancewith the invention, is to be mounted.

The device 2 comprises a pair of bolts 3 arranged to extend through thetransom 1 in transversely aligned relation. Each bolt preferably has alarge flat head 4 for rigid engagement with the back face of transom 1.An elongated base plate 5 through which each bolt extends is adapted tobe fixed to the front face of the transom, as shown. Each bolt isrigidly clamped to its plate 5 by means of a key 6 driven into a keyway7 in the bolt and firmly anchoring the bolt against turning movement inthe plate.

The bolt is fixed in place on the transom by means of a nut 8 and lockwasher 9 engaging the plate 5.

An internally threaded hollow post 10 is screwthreadedly mounted on eachbolt, the height of the post, with respect to the front face of thetransom, being adjustable by rotating the post on the bolt.

When the post 10 has been adjusted to any desired height, a spacerwasher 11 may be interposed between the nut 8 and adjacent end of thepost.

The other or outer end of each post is provided with a pair of alignedears 12 and between one such pair of ears, the end of a rod 13 ispivotally mounted by means for a pin 14 for swinging movement about thepost. The other end of the rod 13 is attened as indicated at 15 forreception between the pair of ears 12 on the other post. The portion 15of the rod is provided preferably with a pluralit3l of holes 16, one ofwhich is adapted to register with complementary openings 17 in the ears12. Any suitable Din, such as the shank 18 of a padlock 19, is adaptedto extend through openings 17 and a hole 16 to lock the rod 13 to thelatter post.

ln use, when an outboard motor is desired to be ICC mounted on thetransom 1, the device 2 is mounted thereon with its posts 10 in properlyspaced relation to receive therebetween the conventional clampingbracket of the motor, with the clamping screws of the bracket, asindicated at 20, in such position that the rod 13 will be in oppositerelation to the heads of the clamping screws 20. With the clampingscrews 20 in clamped position on the transom, the posts 10 are adjustedas to height whereby in the locked position of the rod 13, as shown,such rod 13 will firmly engage the heads of the clamping screws, asshown.

It will thus be apparent that the clamping screws 20 will be rmly lockedin clamping position by the device 2, whereby loosening of such screwsis prevented.

It will also be apparent that the device 2, when employed in conjunctionwith padlock 19 or similar locking means, provides a convenient meansfor preventing unauthorized removal or theft of the motor.

The slightly modified device shown in Figure 4, includes a bolt 21 whichis inclined with respect to its head 22. The post 10 mounted on the bolt21 is thus also inclined, which may be desirable under certaincircumstances. The device in this form also includes a ring 23 havingone of its faces inclined and parallel with head 22 for engagement withthe brace plate 5 and its other face normal to the axis of the bolt forengagement by the lock washer 9 or nut 8. It will be apparent that withthe nut 8 in tightened relation, the bolt 21, in this embodiment, willbe locked against rotation and thus no locking key 6, such as isprovided in the other embodiment, is necessary.

While the device is subject to wide variation as to the dimensions ofits elements, the following are given by way of example:

Inches Length of bolt 3 2-21/2 Diameter of head 4 2 Length of post 102-2Vz Length of rod 13 13-16 It will be observed that the diameter ofhead 4 is preferably as great as the length of bolt 3, or the majorportion thereof, to provide added rigidity of mounting thereof in thetransom 1.

I claim:

l. In combination with a boat transom, an outboard motor locking devicecomprising a pair of bolts extending through the transom said pair ofbolts each having a head engaging the rear face of said transom, ahollow internally threaded post in adjustable screwthreaded engagementwith each bolt, a brace plate through which each said bolt extends,fixed to the front face of said transom, means holding each said bolt inimmovable relation to said brace plate, a rod having one end pivotallymounted on the end of one of said posts, and means on the end of theother of said posts for removably securing thereto the other end of saidrod.

2. In combination with a boat transom and clamping screws for anoutboard motor for attaching said motor to said transom, said clampingscrews being in clamping engagement with said transom, a locking devicecomprising a pair of bolts extending through said transom and eachhaving a head engaging the rear face of said transom, a hollowexternally threaded post in adjustable screw-threaded engagement witheach bolt, a brace plate through which each said bolt extends fixed tothe face of said transom, means holding each said bolt m immovablerelation to said base plate, a rod having one end pivotally mounted onthe end of one of said posts, and means on the other end of said postsfor removably securing thereto the other end of said rod, said rod beingin opposed aligned relation to the heads of said clamping screws.

3. A device as defined in claim l, each said bolt head being at andbeing bodily inclined at an acute angle to the axis of the shank of thebolt.

4. A device as defined in claim l each said bolt head being flat, andbeing bodily inclined at an acute angle to the axis of the shank of thebolt, and including a ring mounted on said bolt, said ring having oneend face mclmed in parallel relation to said inclined head ahdengagingsaidbraplzlte; 'and its other end face nor- Number mal to the axis ofthe shank of said bolt for engagement 2,237,236 bgf- Yh-ff- ReferencesvCited in the le of this patent 5 T Y: 3') lh rpt F. frm: .75; :t .yr-f,Number BAINS 606145 Number N 4 Name Date Matthews Apr. 1, 1941 Telmel"..2... NOV; 7', FOREIGN ATENTs Country Date France June 8, 1926

